A door curtain machine uses a motor to drive a cross-flow or centrifugal fan wheel, generating a powerful airflow to create an "invisible door curtain." It divides indoor and outdoor areas into two independent temperature zones, creating a comfortable indoor environment while maintaining indoor air conditioning and purifying indoor air. It saves energy and promotes air circulation, effectively isolating dust, smoke, odors, insects, and microorganisms.

Applications
Door curtain machines are installed above the entrances of refrigerated rooms, air-conditioned spaces, dust-proof and heat-insulated areas such as theaters, hotels, restaurants, conference halls, cold storage facilities, and homes. When activated, they separate indoor and outdoor air and dust, providing convenient access while preventing the exchange of cold and hot air between indoors and outdoors.

Additionally, they offer protection against odors, pollution, mosquitoes, and flies. Currently, door curtain machines are widely used in industries such as electronics, instrumentation, food processing, footwear manufacturing, services, and commerce, creating a favorable business environment for many merchants.